Figure 1
From: Surveillance of avian influenza viruses from 2009 to 2013 in South Korea
Sampling sites and hemagglutinin (HA) and neuraminidase (NA) subtypes of isolated avian influenza viruses from the fecal matter of wild migratory birds from 2009–2013. (a) Sampling sites (triangles) from 2009–2013, and representative clusters of highly pathogenic avian influenza outbreaks in poultry in South Korea from 2008–2014 (circles). Frequencies of isolates (out of 126 total isolates) per sampling site are shown in the pie chart. All (b) HA and (c) NA subtypes were identified through reverse transcription polymerase chain reaction using universal primers.
